https://developer.harness.io/docs/continuous-integration/use-ci/build-and-upload-artifacts/build-and-push/build-and-push-to-docker-jfrog/#publish-build-metadata-to-a-docker-image-in-jfrog-docker-registry has been useful for our team.

For the Build Metadata, we'd like the Build Metadata to include a field, for example, "Principal", that can contain the email/id/reference of who executed the build on the pipeline.